Kick cats to keep them from exploding in Kenneth Wong's wacky casual arcade game, Hackycat. We also have a fitness app that allows you to track your mountain bike rides, and a relaxing yet challenging original puzzle game.

All app prices are subject to change at any time and without notice regardless of stated free duration. Price changes are solely under the control of the developers.

iPhone:

DUBSTEP / Loops / Keyboard / Drums ($0.99 → Free, 46.4 MB): Get your dubstep fix anytime, anywhere with this music app. You're able to create your own dubstep beats by triggering loops, sound effects, and bass drops. You can also tap away on the drum pads, or blast melodies on the keyboard. The app includes 40 MPC style loops and sound effects pads, and six drum pads.

DUBSTEP / Loops / Keyboard / Drums is available for free for a limited time. It has a 4-star rating with a total of 14 ratings.

PokerTower ($0.99 → Free, 2.2 MB): Poker meets match-three in this addictive casual game. Just tap or drag your finger across adjacent cards to create the best possible poker hands. That's really all there is to it! There are five different ways to play, including local and online multiplayer. The game also includes stat tracking, a full step-by-step tutorial, and achievements and leaderboards via Game Center.

PokerTower is available for free today only (03/31). It has a 5-star rating with a total of 13 ratings.

Mountain Bike PRO Cycling Computer powered by runtastic ($4.99 → Free, 15.3 MB): Keep track of your mountain bike rides with this health and fitness app. It's able to record your trip duration, distance, altitude, and calories burned. If you're going for a ride in an area with poor cellular coverage, you can choose to download map data ahead of time for offline viewing. The app also includes weather data, voice feedback, automatic pause detection, the ability to take pictures on your route, and the ability to share your journey via Facebook, Twitter, or email.

Mountain Bike PRO Cycling Computer powered by runtastic is available for free for a limited time. It has a 4.5-star rating with a total of 403 ratings.

Universal:

LetsTans Checkered ($0.99 → Free, 9.7 MB): This Tangram puzzle game offers a whole new challenge by requiring you to not only restore shapes but also align patterns. Each level presents you with a Tangram shape, and you must drag and drop the seven pieces from the sides into place to complete it. Keep in mind that the pieces must also match the pattern within the shape. You're able to tap once to rotate a piece and double-tap to flip it. The game includes 200 puzzles, and an advanced hint system.

LetsTans Checkered is available for free today only (03/31). It has a 4.5-star rating with a total of 60 ratings.

i See-quence... Easter Social Skills Stories ($2.99 → Free, 37.6 MB): This educational app will help your little ones understand Easter and Easter-related activities. It includes two separate books: Easter and Easter Egg Hunts. Both books include easy to comprehend illustrations. You can also customize both books with your own images, audio, and text. The app includes multiple user support, favorites, and the ability to add and reorder pages.

i See-quence... Easter Social Skills Stories is available for free for a limited time. It has a 4-star rating with a total of 5 ratings.

Hackycat ($0.99 → Free, 38.3 MB): Keep cute cats in the air for as long as possible to save them from exploding in this wacky casual arcade game. Tap to move your character around the environment and kick, knee, and head-butt the adorable little Hackycats. String together combos, kick multiple cats at a time, unleash power-ups, and do whatever it takes to keep those cats in the air. The game includes more than two dozen Hackycats to unlock, all kinds of objectives to complete, and achievements and leaderboards via Game Center.

Hackycat is available for free for a limited time. It has a 4.5-star rating with a total of 301 ratings.

NetSnips - Follow Just Snippets of Webpages ($1.99 → Free, 2.7 MB): Track updates to your favorite websites in a whole new way with this utility app. To create a snippet, just head to a website and crop out only the portion you want. You can then drag and drop the snippet into place on your wall. Perform the process over and over again with other websites to create a wall of information. You're also able to tap on a snippet to be brought directly to its page, and double-tap on a snippet to force it to reload. The app includes the ability to adjust the time between automatic updates as well.

NetSnips - Follow Just Snippets of Webpages is available for free for a limited time. It has a 4-star rating with a total of 21 ratings.

Cling! ($0.99 → Free, 26.3 MB): Help Edgar, an eight-legged toy that has received the honor of having an owner, escape the vending machine in this physics-based platformer. Edgar is only able to move around the environments by latching onto colored pegs. You must try to safely guide him through the environments that are littered with dangerous objects and creatures as quickly as possible. The game includes 90 levels, all kinds of power-ups and costumes to unlock, and achievements and leaderboards via Game Center.

Cling! is available for free for a limited time. It has a 5-star rating with a total of 24 ratings.

Use Your Handwriting GOLD ($6.99 → Free, 15.2 MB): Use your own handwriting to jot down notes, take messages, and create task lists with this business app. Tap the add button in the top right corner of the screen to jump right into the creation process. Then choose a color, and start writing on the screen. When you're finished, tap the done button to return to your list. All entries can be reordered, edited, shared, and categorized at any time. The app also includes a variety of customization options, icon badging, and the ability to set priority levels.

Use Your Handwriting GOLD is available for free for a limited time. It has a 4-star rating with a total of 3070 ratings.

iPad:

Envelope HD ($0.99 → Free, 30.6 MB): A relaxing yet challenging original puzzle game. Each level presents you with a different geometric shape. Your job is to try and overlap the shape by dragging the connect points from the bottom of the screen into their correct positions at the top. Complete the task as quickly as possible, because you're being timed. The game includes a total of 30 shapes, and stat tracking.

Envelope HD is available for free today only (03/31). It has a 4.5-star rating with a total of 11 ratings.

PhotosInfoPro ($4.99 → Free, 4.3 MB): Take control of your photo metadata with this professional photography app. You're able to view and edit the metadata for every one of the photos in your library. You can edit everything from the rating and location data to keywords and usage terms. You're also able to export JPEGs with the metadata embedded or just XMP files via iTunes File Sharing, Dropbox, or the web.

PhotosInfoPro is available for free for a limited time. It has a 4-star rating with a total of 15 ratings.

That concludes today's issue of Apps Gone Free. If you like staying on top of these daily deals, don't forget to check out our free AppsGoneFree app. It provides all the deals each day, and even an archive of past deals that are still active.

Developers:

If you are a developer who would like to get your app included in our “Apps Gone Free” daily lists, here’s our basic set of rules:

It must have at least a three-star average rating at the time it goes free.

The app must not have been free numerous times (3+) over the last six months.

The free version of your app must not include ads.

To submit an app, simply send a request to [email protected] with the subject “Apps Gone Free.” Please include the name of the app, a link to it in the App Store, when and for how long you intend to offer the app for free, and anything else you would like to share. We will take it from there.